greenchild623
need help with system: -14=-2=y-7x
2x=10y +4 PLEASE HELP!!!!
Delete
Share
This Question is Closed
eashmore
Best Response
You've already chosen the best response.
0
What do you need to do with the system?
greenchild623
Best Response
You've already chosen the best response.
0
solve for x and y
eashmore
Best Response
You've already chosen the best response.
0
Is the system\[\begin{matrix}-14 - 2 = y-7x \\ 2x = 10y + 4\end{matrix}\]
eashmore
Best Response
You've already chosen the best response.
0
Do you have to use any particular method?
greenchild623
Best Response
You've already chosen the best response.
0
sorry.... it is:
-14=-20y-7x
10y +4 = 2x
greenchild623
Best Response
You've already chosen the best response.
0
solve by elimination....
greenchild623
Best Response
You've already chosen the best response.
0
(sigh...)
eashmore
Best Response
You've already chosen the best response.
0
Weird. I replied to this but my answer isn't showing up. Let me re-type it real fast.
greenchild623
Best Response
You've already chosen the best response.
0
'k
eashmore
Best Response
You've already chosen the best response.
0
First, we need to solve the first equation for x. We get\[x = -(20/7)y + 2\] Then we substitute this expression into the second equation. This yields \[10y - 2(-(20/7)y + 2) = -4\]Solve this for y and plug the value of y back into our expression for x.
Let me know what you get.
greenchild623
Best Response
You've already chosen the best response.
0
x=34
y=?